You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
Imagine a closer relationship between Russia and Great Britain following Napoleon's defeat, starting with Alexander I not getting sucked into Klemens von Metternich's (and therefore Austria's) orbit but instead remaining friends with Robert Stewart, Viscount Castlreagh, the Foreign Minister and eventually (in this ATL) Prime Minister of Great Britain. OTL. This goes on, with Russia normally supporting Britain at the various congresses in Europe and an unofficial "military hands off" policy with Bukhara, Khiva, Kokand and Afghanistan in the 1830s and 1840s (only jockeying for trade agreements with them) so as to reduce antagonism with the other until 1853 when Alexander II tells British Ambassador that he is no longer interested in expanding Imperial Russia but he must protect the Orthodox Christians in the Ottoman Empire and in return for past support in Europe he requires British support against the Ottomans.
Is this closer relationship an unofficial agreement in Central Asia enough to make the British believe Alexander's statement where the did not in OTL and do one or more of:
stay out of the Crimean War
try to convince the French to stay out of the Crimean War